EP 1023729 A1 20000802 - FRAME-BASED AUDIO CODING WITH VIDEO/AUDIO DATA SYNCHRONIZATION BY AUDIO SAMPLE RATE CONVERSION
Title (en)
FRAME-BASED AUDIO CODING WITH VIDEO/AUDIO DATA SYNCHRONIZATION BY AUDIO SAMPLE RATE CONVERSION
Title (de)
RAHMENBASIERTE AUDIOKODIERUNG MIT VIDEO/AUDIO-DATENSYNCHRONISIERUNG DURCH ABTASTRATENUMSETZUNG
Title (fr)
CODAGE AUDIO SUR LA BASE DE TRAMES AVEC UNE SYNCHRONISATION DE DONNEES VIDEO/AUDIO AU MOYEN D'UNE CONVERSION DE FREQUENCES ECHANTILLONS AUDIO
Publication
Application
Priority
- US 9821764 W 19981015
- US 95330697 A 19971017
Abstract (en)
[origin: US5913190A] Several audio signal processing techniques may be used in various combinations to improve the quality of audio represented by an information stream formed by splice editing two or more other information streams. The techniques are particularly useful in applications that bundle audio information with video information. In one technique, gain-control words conveyed with the audio information stream are used to interpolate playback sound levels across a splice. In another technique, special filterbanks or forms of TDAC transforms are used to suppress aliasing artifacts on either side of a splice. In yet another technique, special filterbanks or crossfade window functions are used to optimize the attenuation of spectral splatter created at a splice. In a further technique, audio sample rates are converted according to frame lengths and rates to allow audio information to be bundled with, for example, video information. In yet a further technique, audio blocks are dynamically aligned so that proper synchronization can be maintained across a splice. An example for 48 kHz audio with NTSC video is discussed.
IPC 1-7
IPC 8 full level
G10L 19/02 (2013.01); G10L 25/00 (2013.01); G11B 20/10 (2006.01); G11B 27/02 (2006.01); G11B 27/031 (2006.01); G11B 27/038 (2006.01); H03M 7/30 (2006.01); H04B 14/04 (2006.01)
CPC (source: EP KR US)
G11B 20/10527 (2013.01 - EP US); G11B 27/031 (2013.01 - EP KR US); G11B 27/038 (2013.01 - EP US); H03H 17/0266 (2013.01 - KR)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9921189 A1 19990429; AT E210880 T1 20011215; AU 1088499 A 19990510; AU 746613 B2 20020502; CA 2306112 A1 19990429; CA 2306112 C 20051220; DE 69802958 D1 20020124; DE 69802958 T2 20020620; DK 1023729 T3 20020325; EP 1023729 A1 20000802; EP 1023729 B1 20011212; ES 2165196 T3 20020301; JP 2001521310 A 20011106; JP 4126682 B2 20080730; KR 100609400 B1 20060804; KR 20010024530 A 20010326; US 5913190 A 19990615
DOCDB simple family (application)
US 9821764 W 19981015; AT 98953541 T 19981015; AU 1088499 A 19981015; CA 2306112 A 19981015; DE 69802958 T 19981015; DK 98953541 T 19981015; EP 98953541 A 19981015; ES 98953541 T 19981015; JP 2000517419 A 19981015; KR 20007004122 A 20000417; US 95330697 A 19971017